瑜伽論記 4.145

4.145

一云，緣真如作意；二云，緣此無漏作意，以為所緣故云緣清淨所緣作意也。

One says: It is mental application that focuses on tathatā. The second says: Taking this taintless mental application itself as the object of focus, it is therefore called 'the mental application whose object of focus is the pure object'.